Will
The future simple its formed with will + the infinitive.


Afirmative:
I'll go ('ll=contraction of will)
you'll go
he/she/it'll go
we/you/they'll go



Negative:
I won't go (won't = will not)
you won't go
he/she/it won't go
we/you/they won't go



Interrogative:
Will I go?
Will you go?
Will he/she/it go?
Will we/you/they go?



Short answer:
Yes, I will
Yes, you will
Yes, he/she/it will
Yes, we/you/they will



Use:
To express future predictions
ex:
Tomorow it will be raining all the day

To make promises
ex:
I will study very hard during the year.


To make an offer
ex:
-I can't move the sofa, its very heavy...
-Don't worry, I will move it dor you


To make a decision
ex:
Today I will have dinner pizza




Future with going to
Its formed with the present coninuous of the verb to go + the infinitive of the principal verb.


Afirmative:
I am going to go out
you are going to go out
he/se/it is going to go out
we/you/they are going to go out


Negative:
I am not going to go out
You aren't going to go out
he/she/it isn't going to go out
we/you/they aren't going to go out


Interrogative:
Am I going to go out?
Are you going to go out?
Is he/she/it going to go out?
Are we/you/they going to go out?


Short answer:
Yes, I am
Yes, you are
Yes, he/she/it is
Yes, we/you/they are



Use:
It is used to:


Express intentions
ex:
I am going to do homewrok every evening.


Future planes:
ex:
I am going to paint my bedroom


To make predictions with true facts of the present.
ex:
This clouds are very dark, it is going to rain.